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What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
I tried researching the difference between cout , cerr and clog on the internet but couldn't find a perfect answer. I still am not clear on when to use which. Can anyone explain to me, through simple programs and illustrate a perfect situation on when to use which one?
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round up to 2 decimal places in java? [duplicate]
...Well this one works...
double roundOff = Math.round(a * 100.0) / 100.0;
Output is
123.14
Or as @Rufein said
double roundOff = (double) Math.round(a * 100) / 100;
this will do it for you as well.
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Java List.add() UnsupportedOperationException
...at are either immutable or only allow some selected changes.
You can find out about this by reading the documentation of UnsupportedOperationException and List.add(), which documents this to be an "(optional operation)". The precise meaning of this phrase is explained at the top of the List documen...
How can I find out a file's MIME type (Content-Type)?
Is there a way to find out the MIME type (or is it called "Content-Type"?) of a file in a Linux bash script?
5 Answers
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pandas: filter rows of DataFrame with operator chaining
...ring is done by "chaining" the criteria in the boolean index.
In [96]: df
Out[96]:
A B C D
a 1 4 9 1
b 4 5 0 2
c 5 5 1 0
d 1 3 9 6
In [99]: df[(df.A == 1) & (df.D == 6)]
Out[99]:
A B C D
d 1 3 9 6
If you want to chain methods, you can add your own mask method ...
How to find out where a function is defined?
How can I find out in which file and line a given function was defined?
8 Answers
8
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How do I clone a subdirectory only of a Git repository?
... community is that if you have several directories that are always checked out independently, then these are really two different projects and should live in two different repositories. You can glue them back together using Git Submodules.
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Difference between String#equals and String#contentEquals methods
...ntentEquals, which won't touch numbers, for example), but you're correct about equals checking for an exact type match with Strings (other classes might be looser with types in their equals methods).
– Olathe
Mar 18 '16 at 0:09
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How to add a new audio (not mixing) into a video using ffmpeg?
...io
ffmpeg -i video.mp4 -i audio.wav -map 0:v -map 1:a -c:v copy -shortest output.mp4
The -map option allows you to manually select streams / tracks. See FFmpeg Wiki: Map for more info.
This example uses -c:v copy to stream copy (mux) the video. No re-encoding of the video occurs. Quality is prese...
How to import an existing X.509 certificate and private key in Java keystore to use in SSL?
...rts it since Java 6. This is the link he provided
– Houtman
Dec 8 '14 at 11:58
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